felipe0387 01/12/2021 70% de 3000 + 60% de 7000 + x% de 5400 = 900070/100 . 3000 = 30 . 70 = 210060/100 . 7000 = 70 . 60 = 4200x + 4200 + 2100 = 9000x = 2700x/100 . 5400 = 2700x . 54 = 2700x = 2700/54x = 50%
felipe0387
70% de 3000 + 60% de 7000 + x% de 5400 = 9000
70/100 . 3000
= 30 . 70
= 2100
60/100 . 7000
= 70 . 60
= 4200
x + 4200 + 2100 = 9000
x = 2700
x/100 . 5400 = 2700
x . 54 = 2700
x = 2700/54
x = 50%